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general technical requirements. Types, basic parameters. general technical requirements Types and basic parameters

4. The validity period was removed according to protocol N 3-93 of the Interstate Council for Standardization, Metrology and Certification (IUS 5-6-93)

5. EDITION (July 2003) with Amendment No. 1 approved in May 1988 (IUS 9-88)


This International Standard applies to general and industrial loupes.

1. TYPES AND MAIN PARAMETERS

1. TYPES AND MAIN PARAMETERS

1.1. Depending on the value of the main parameters, groups of loops are set, indicated in Table 1.

Table 1

Note. The magnification of the magnifying glass when the pupil of the eye is in the back focus should be calculated by the formulas:

where 250 is the distance of the best vision, mm;

- rear focal length of the magnifier, mm.

Formula (1) - for magnifiers with a focal length of up to 150 mm, formula (2) - for magnifiers with a focal length of more than 150 mm.

1.2. Depending on the purpose, the types of magnifiers indicated in Table 2 are established.

table 2

1.3. The symbol of a magnifying glass shall include the type designation, the number of lenses, the magnification and the designation of this standard.

Symbol examples:

single lens textile magnifier with glass optics 4 magnifications:

LT-1-4 GOST 25706-83 ;

three-lens corrected measuring magnifier with plastic optics 10 magnification:

LIP-3-10 GOST 25706-83

2. GENERAL TECHNICAL REQUIREMENTS

2.1. Loupes should be manufactured in accordance with the requirements of this standard and the specification for a particular type of magnifier.

2.2. Loupe lenses must be made of optical glass according to GOST 3514 or optical plastic with a protective coating.

2.3. The surface cleanliness of the lenses must comply with the requirements of GOST 11141; the purity class should be selected depending on the diameters of the magnifier lenses in accordance with Table 3.

Table 3

(Changed edition, Rev. N 1).

2.4. The quality of the image must be clear throughout the entire field of view and correspond to the standard approved in the prescribed manner.

2.5. Loupe lenses must be firmly fixed and must not rotate in the frames.

2.6. The surfaces of the frame and body of magnifiers must not have nicks, dents or other defects.

2.7. In folding magnifiers, the swivel must ensure that the magnifier is fixed with a handle at any opening angle.

2.8. The design of grain magnifiers should provide light access to the object in question.

2.9. The shape, size and marking of magnifiers must comply with the specifications for a particular type of magnifier.

2.10. For loupes with plastic optics, the lens clamping rings must be made of plastic.

2.11. The magnifying glass body, made of metal, must have a durable anti-corrosion coating.

2.12. On the frame of the magnifying glass should be applied:

trademark of the manufacturer;

zoom magnification.

2.13. Magnifier lenses made of polymeric materials should not have gross casting defects. Underpressure, sagging, yellowness of materials, as well as deposits on the working surfaces of the lens are not allowed.

2.14. Magnifiers must withstand during transportation the effect of ambient temperature from minus 45 °C to plus 45 °C.

2.15. Loupes must be resistant to mechanical stress during transportation with an overload of 4g.

2.16. Magnifiers should be made in climatic version UHL category 4.2 according to GOST 15150.

2.17. The established full service life of magnifiers with glass optics is 10 years, with plastic optics - 4 years.

(Changed edition, Rev. N 1).

The text of the document is verified by:
official publication
M.: IPK Standards Publishing House, 2003

Interstate standard GOST 25706-83
"Loupes. Types, basic parameters. General technical requirements"
(approved by the resolution of the State Standard of the USSR of April 8, 1993 N 1684)

Magnifiers. Types, basic parameters. General technical requirements

Instead of GOST 7594-75; GOST 8307-72;

GOST 8309-75; GOST 9461-74;

GOST 10513-73; GOST 18504-73

This International Standard applies to general and industrial loupes.

1. Types and basic parameters

1.1. Depending on the value of the main parameters, groups of loops are set, indicated in Table. one.

Table 1

Note. The magnification of the magnifying glass when the pupil of the eye is in the back focus should be calculated by the formulas:

where 250 is the distance of the best vision, mm;

f" - rear focal length of the magnifier, mm.

Formula (1) - for magnifiers with a focal length of up to 150 mm, formula (2) - for magnifiers with a focal length of more than 150 mm.

1.2. Depending on the purpose, the types of magnifiers indicated in Table. 2.

table 2

1.3. The symbol of a magnifying glass shall include the type designation, the number of lenses, the magnification and the designation of this standard.

Symbol examples:

single lens textile magnifier with magnifying glass optics:

GOST 25706-83;

three-lens corrected measuring loupe with magnification plastic optics:

GOST 25706-83

2. General technical requirements

2.1. Loupes should be manufactured in accordance with the requirements of this standard and the specification for a particular type of magnifier.

2.2. Loupe lenses must be made of optical glass according to GOST 3514 or optical plastic with a protective coating.

2.3. The surface cleanliness of the lenses must comply with the requirements of GOST 11141; the purity class should be selected depending on the diameters of the lenses of the magnifiers in accordance with the table. 3.

Table 3

(Changed edition, Rev. N 1).

2.4. The quality of the image must be clear throughout the entire field of view and correspond to the standard approved in the prescribed manner.

2.5. Loupe lenses must be firmly fixed and must not rotate in the frames.

2.6. The surfaces of the frame and body of magnifiers must not have nicks, dents or other defects.

2.7. In folding magnifiers, the swivel must ensure that the magnifier is fixed with a handle at any opening angle.

2.8. The design of grain magnifiers should provide light access to the object in question.

4. The validity period was removed according to protocol N 3-93 of the Interstate Council for Standardization, Metrology and Certification (IUS 5-6-93)

5. EDITION (July 2003) with Amendment No. 1 approved in May 1988 (IUS 9-88)


This International Standard applies to general and industrial loupes.

1. TYPES AND MAIN PARAMETERS

1. TYPES AND MAIN PARAMETERS

1.1. Depending on the value of the main parameters, groups of loops are set, indicated in Table 1.

Table 1

Note. The magnification of the magnifying glass when the pupil of the eye is in the back focus should be calculated by the formulas:

where 250 is the distance of the best vision, mm;

- rear focal length of the magnifier, mm.

Formula (1) - for magnifiers with a focal length of up to 150 mm, formula (2) - for magnifiers with a focal length of more than 150 mm.

1.2. Depending on the purpose, the types of magnifiers indicated in Table 2 are established.

table 2

1.3. The symbol of a magnifying glass shall include the type designation, the number of lenses, the magnification and the designation of this standard.

Symbol examples:

single lens textile magnifier with glass optics 4 magnifications:

LT-1-4GOST 25706-83;

three-lens corrected measuring magnifier with plastic optics 10 magnification:

LIP-3-10GOST 25706-83

2. GENERAL TECHNICAL REQUIREMENTS

2.1. Loupes should be manufactured in accordance with the requirements of this standard and the specification for a particular type of magnifier.

2.2. Loupe lenses must be made of optical glass according to GOST 3514 or from optical plastic with a protective coating.

2.3. The surface finish of the lenses must meet the requirements GOST 11141; the purity class should be selected depending on the diameters of the magnifier lenses in accordance with Table 3.

Table 3

(Changed edition, Rev. N 1).

2.4. The quality of the image must be clear throughout the entire field of view and correspond to the standard approved in the prescribed manner.

2.5. Loupe lenses must be firmly fixed and must not rotate in the frames.

2.6. The surfaces of the frame and body of magnifiers must not have nicks, dents or other defects.

2.7. In folding magnifiers, the swivel must ensure that the magnifier is fixed with a handle at any opening angle.

2.8. The design of grain magnifiers should provide light access to the object in question.

2.9. The shape, size and marking of magnifiers must comply with the specifications for a particular type of magnifier.

2.10. For loupes with plastic optics, the lens clamping rings must be made of plastic.

2.11. The magnifying glass body, made of metal, must have a durable anti-corrosion coating.

2.12. On the frame of the magnifying glass should be applied:

trademark of the manufacturer;

zoom magnification.

2.13. Magnifier lenses made of polymeric materials should not have gross casting defects. Underpressure, sagging, yellowness of materials, as well as deposits on the working surfaces of the lens are not allowed.

2.14. Magnifiers must withstand during transportation the effect of ambient temperature from minus 45 °C to plus 45 °C.

2.15. Loupes must be resistant to mechanical stress during transportation with an overload of 4g.

2.16. Magnifiers should be made in climatic version UHL category 4.2 according to GOST 15150.

2.17. The established full service life of magnifiers with glass optics is 10 years, with plastic optics - 4 years.

(Changed edition, Rev. N 1).

The text of the document is verified by:
official publication
M.: IPK Standards Publishing House, 2003

4. The validity period was removed according to protocol N 3-93 of the Interstate Council for Standardization, Metrology and Certification (IUS 5-6-93)

5. EDITION (July 2003) with Amendment No. 1 approved in May 1988 (IUS 9-88)


This International Standard applies to general and industrial loupes.

1. TYPES AND MAIN PARAMETERS

1. TYPES AND MAIN PARAMETERS

1.1. Depending on the value of the main parameters, groups of loops are set, indicated in Table 1.

Table 1

Note. The magnification of the magnifying glass when the pupil of the eye is in the back focus should be calculated by the formulas:

where 250 is the distance of the best vision, mm;

- rear focal length of the magnifier, mm.

Formula (1) - for magnifiers with a focal length of up to 150 mm, formula (2) - for magnifiers with a focal length of more than 150 mm.

1.2. Depending on the purpose, the types of magnifiers indicated in Table 2 are established.

table 2

1.3. The symbol of a magnifying glass shall include the type designation, the number of lenses, the magnification and the designation of this standard.

Symbol examples:

single lens textile magnifier with glass optics 4 magnifications:

LT-1-4 GOST 25706-83 ;

three-lens corrected measuring magnifier with plastic optics 10 magnification:

LIP-3-10 GOST 25706-83

2. GENERAL TECHNICAL REQUIREMENTS

2.1. Loupes should be manufactured in accordance with the requirements of this standard and the specification for a particular type of magnifier.

2.2. Loupe lenses must be made of optical glass according to GOST 3514 or optical plastic with a protective coating.

2.3. The surface cleanliness of the lenses must comply with the requirements of GOST 11141; the purity class should be selected depending on the diameters of the magnifier lenses in accordance with Table 3.

Table 3

(Changed edition, Rev. N 1).

2.4. The quality of the image must be clear throughout the entire field of view and correspond to the standard approved in the prescribed manner.

2.5. Loupe lenses must be firmly fixed and must not rotate in the frames.

2.6. The surfaces of the frame and body of magnifiers must not have nicks, dents or other defects.

2.7. In folding magnifiers, the swivel must ensure that the magnifier is fixed with a handle at any opening angle.

2.8. The design of grain magnifiers should provide light access to the object in question.

2.9. The shape, size and marking of magnifiers must comply with the specifications for a particular type of magnifier.

2.10. For loupes with plastic optics, the lens clamping rings must be made of plastic.

2.11. The magnifying glass body, made of metal, must have a durable anti-corrosion coating.

2.12. On the frame of the magnifying glass should be applied:

trademark of the manufacturer;

zoom magnification.

2.13. Magnifier lenses made of polymeric materials should not have gross casting defects. Underpressure, sagging, yellowness of materials, as well as deposits on the working surfaces of the lens are not allowed.

2.14. Magnifiers must withstand during transportation the effect of ambient temperature from minus 45 °C to plus 45 °C.

2.15. Loupes must be resistant to mechanical stress during transportation with an overload of 4g.

2.16. Magnifiers should be made in climatic version UHL category 4.2 according to GOST 15150.

2.17. The established full service life of magnifiers with glass optics is 10 years, with plastic optics - 4 years.

(Changed edition, Rev. N 1).

The text of the document is verified by:
official publication
M.: IPK Standards Publishing House, 2003